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CHAPTEE VIII
EDENTATA—GANODONTA
Order II.
TERRESTRIAL, partly subterranean, or arboreal creatures of quite
small to gigantic size (some extinct genera), with frequently a
covering of scales or bony scutes. Limbs clawed. Teeth either
totally absent or, if present, imperfect in structure, being with-
out enamel, and not forming a complete series; incisors and
canines being as a rule absent Teats axillary, pectoral, or
inguinal1 Eetia mirabilia very common in the extremities.
To this group the name of Bruta was given by Linnaeus,
but then it included not only the families which we now place
in the modern order Edentata, but also the Elephant and the
genus Trichechus. Mr. Thomas has proposed to change the
name into Paratheria, which name is suggestive of what he and
some others think concerning the systematic position of the
group, i.e. that it is not to be placed in the Eutherian group of
mammals at all, but represents a separate twig which has arisen
with the Eutheria from a low mammalian stock. This view can
hardly be accepted if the Oanodonta—which will be treated of
presently—be really ancestral Edentates, for they are not in any
way a Prototherian mammalian group, so far as their remains
enablo us to ju'tge.
The Edentata contain the Sloths, Ant-bears, Armadillos,
Man'iB and On/cfe-rupus, among living forms. The great Ground-
Sloths, Megatherium, etc., and Armadillos, fllyptodon, etc., repre-
sent the extinct forms.
The iiiiuie that has been applied to this group is inappropriate
1 Pectoral and abdominal in tho Armadillo Tatutia.
VOL. X                                                                                           ty